I drive 2001 S430 ,car has been very good for my family,i had an accident (rear end hit and run) while my car was parked,when i tried to drive shift will not move from park.i took it to James Motor company they were charging me arm and leg for the replacement of shifter unit.in the mean time i was researching online for the second opinion from friends, who own Mercedes Benz s430.I was highly recommended by few friends to contact sheller Automotive I called and spoke with a gentleman who was very helpful and polite,he explained me the common cause of the shifter, stuck on park .i had diagnostic done at James motor company,it was same like this gentleman at Sheller automotive explained me over the Phone.I was so satisfied with his explanation n his dealing that I had my car towed to Sheller Automotive.I will highly recommend Sheller Automotive for service to anyone who owns a Mercedes or BMW products.Prices are reasonable,and service is excellent.God Bless Sheller Automotive. Gilani